Almoravid architecture corresponds to a period from the 11th to 12th centuries when the Almoravids ruled over the western Maghreb (present-day Morocco and western Algeria) and al-Andalus (a large part of present-day Spain and southern Portugal). It was an important phase in the development of a regional Moorish (or western Islamic) architecture, as the styles and craftsmanship of al-Andalus were further imported and developed in North Africa. The Almoravids founded the city of Marrakesh as their capital and built many mosques in the region, although much of what they built has not preserved.[1] The Almoravids were overthrown by the Almohads in the 12th century, after which Almohad architecture continued to develop some of the same trends in the Maghreb and al-Andalus.